   0   9   9   7   0   0   0   0   0   0   0   0   0   0
   9   0   0  13   0   0  20   0   0   0   0   0   0   0
   9   0   0   0   7   0   0  16   0   0   0   0   0   0
   7  13   0   0   0   0   0   0   0   0  15   0   0   0
   0   0   7   0   0   7   0   0   0   0  11   0   0   0
   0   0   0   0   7   0   7   0   0   0   0   0   0   0
   0  20   0   0   0   7   0   0   0   7   0   0   0   0
   0   0  16   0   0   0   0   0   5   0   0   0   0   8
   0   0   0   0   0   0   0   5   0   5   0   0   7   0
   0   0   0   0   0   0   7   0   5   0   0   8   0   8
   0   0   0  15  11   0   0   0   0   0   0   9  14   0
   0   0   0   0   0   0   0   0   0   8   9   0   0   0
   0   0   0   0   0   0   0   0   7   0  14   0   0   4
   0   0   0   0   0   0   0   8   0   8   0   0   4   0 